Complex radar target simulator

Abstract

A complex radar target emitter having independent control of three radio frequency (RF) radiation field characteristics, the radiation field characteristics being the real and imaginary components of the complex amplitude of the radiation field, the spatial derivative of the real and imaginary components of the complex amplitude in one of two orthogonal planes, and the spatial derivative of the real and imaginary components of the complex amplitude in the other of the two orthogonal planes.

1. A complex radar target emitter comprising independent control of three radio frequency radiation field characteristics, said field characteristics including:
 i) the real and imaginary components of the complex amplitude of the radiation field, 
 ii) the spatial derivative of the real and imaginary components of the complex amplitude in one of two orthogonal planes and, 
 iii) the spatial derivative of the real and imaginary components of the complex amplitude in the other of said two orthogonal planes. 
 
   
   
     2. A complex radar target emitter as claimed in  claim 1 , wherein said emitter comprises five horns for emitting radio frequency radiation. 
   
   
     3. A complex radar target emitter as claimed in  claim 2 , wherein one of said five horns is used to control the amplitude of the radio frequency radiation field, and the remaining four horns are arranged in two pairs, the horns in each of the two pairs being linked in anti-phase, the two pairs of horns being for generating the spatial derivatives of the real and imaginary components of the complex amplitude in each of said two orthogonal planes respectively.